Part No. 920525 Rev A - Wayne 3/VISTA series Service Manual

The following section describes the operation of those hydraulic parts in Wayne dispensers which
perform some "act". Simple flow tubes will not be discussed.
There are four basic hydraulic parts in the dispenser:
• Strainer and Filter
• Proportional Flow Control Valve iMeter
• Check & Pressure Relief Valve
5.1. STRAINER AND FILTER
The strainer and filter (see Figure 5-1) are mentioned in this document because they may
cause the dispenser to deliver slowly. In some cases this may appear to be a service
problem. In reality the filter should be changed and the strainer cleaned on a regular basis.
Before removing the strainer or filter assembly, trip the impact valve and turn OFF the
circuit breaker for the associated submersible pump.
5.1.1. Strainer
If the underground installation is new, it may be necessary to clean the strainer
screen two or three times the first few days of operation to remove debris and
pipe dope. After this, occasional cleaning of the strainer is all that should be
required. The fuel filter should be changed whenever the strainer is cleaned.
The strainer is located above, and held in place by, the filter. After removing the
filter, again place suitable container below filter/strainer casting to catch product
and sediment, gently pull the strainer downward to remove it from the filter/
strainer casting. Replace or clean strainer screen of any debris and reinstall.
5.1.2. Filter
Like the strainer, in new installations it may be necessary to change the filter
frequently in the first few days of operation in order to ensure proper operation.
The fuel filter is removed the same way an oil filter is removed from a car
engine. Place a container under the filter to catch the fuel. To install the new
filter, first apply a film of oil to the gasket and hand turn until the gasket contacts
the base. Then tighten one half turn. Open the emergency shear valve, turn the
submersible circuit breaker ON and check for leaks.
June 2001
5. HYDRAULIC PARTS

Part No. 920525 Rev A

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